From 9061a75bd77228c9ab155033828aa538e2f0a320 Mon Sep 17 00:00:00 2001
From: Peter Dettman <peter.dettman@bouncycastle.org>
Date: Thu, 20 Oct 2022 01:09:57 +0700
Subject: Account for zOff correctly

---
 crypto/src/math/raw/Interleave.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/crypto/src/math/raw/Interleave.cs b/crypto/src/math/raw/Interleave.cs
index c7c8eb4da..02aa79551 100644
--- a/crypto/src/math/raw/Interleave.cs
+++ b/crypto/src/math/raw/Interleave.cs
@@ -98,7 +98,7 @@ namespace Org.BouncyCastle.Math.Raw
 
         internal static void Expand64To128(ulong[] xs, int xsOff, int xsLen, ulong[] zs, int zsOff)
         {
-            int xsPos = xsLen, zsPos = zsOff + xsLen << 1;
+            int xsPos = xsLen, zsPos = zsOff + (xsLen << 1);
             while (--xsPos >= 0)
             {
                 zsPos -= 2;
-- 
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